X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from m12.lax.untd.com ([64.136.30.75] verified) by logan.com (CommuniGate Pro SMTP 5.1.9) with SMTP id 2084258 for flyrotary@lancaironline.net; Mon, 04 Jun 2007 21:59:42 -0400 Received-SPF: pass receiver=logan.com; client-ip=64.136.30.75; envelope-from=alwick@juno.com Received: from m12.lax.untd.com (localhost [127.0.0.1]) by m12.lax.untd.com with SMTP id AABDGKS44AX9ZV72 for (sender ); Mon, 4 Jun 2007 18:58:50 -0700 (PDT) X-UNTD-OriginStamp: L941HVjjYzDhN3itp//mkFF9cu72unZcVXuDQONxNKDZ6KcXMU2PHw== Received: (from alwick@juno.com) by m12.lax.untd.com (jqueuemail) id MPFGPRTT; Mon, 04 Jun 2007 18:57:51 PDT To: flyrotary@lancaironline.net Date: Mon, 4 Jun 2007 18:56:53 -0700 Subject: Re: [FlyRotary] Single rotor video Message-ID: <20070604.185659.3724.10.alwick@juno.com> X-Mailer: Juno 5.0.49 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary=--__JNP_000_45b6.7d08.43f6 X-Juno-Line-Breaks: 8-6,10-11,13-14,17-22,24,26-30,32-34,38-39,43-44,52-53,56-67,69,71-72,73-32767 From: al p wick X-ContentStamp: 16:8:2844164917 X-MAIL-INFO:36a0a0c080e0e55960e971c0bd7115506585e471cdd06d4480cde485cd25cd055111fd64a041c0c9c01980ad1554f0ad59e06111a170b5b0a591a19999a1dd94f4158d9554d1b40c81548d390039b084a9e13955f93d2091a1793d09a1c1a1c10979a5d4249429b9d07d658d20f9cdfd644110a9653444198505c405e0b1559005 X-UNTD-Peer-Info: 127.0.0.1|localhost|m12.lax.untd.com|alwick@juno.com This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. ----__JNP_000_45b6.7d08.43f6 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit What a great video. I ran it in slow motion. At one point I had impression that blade had flexed far enough to hit trailer! I would be very concerned for blade flex unless I had clear proof it has no long term effect. Check out the movement of wires and hoses. Makes you appreciate the import of adding supports and wire ties. I was curious if video from in front would show the same effects. If it doesn't, possibly cause is related to fore/aft blade support. Not likely, but worth checking. Excellent analysis tool, video. Good work. -al wick Cozy IV powered by Turbo Subaru 3.0R with variable valve lift and cam timing. Artificial intelligence in cockpit, N9032U 240+ hours from Portland, Oregon Glass panel design, Subaru install, Prop construct, Risk assessment info: http://www.maddyhome.com/canardpages/pages/alwick/index.html On Mon, 4 Jun 2007 10:16:16 -0500 "Russell Duffy" writes: Greetings, I made a short video yesterday of a single rotor run. The purpose was to demonstrate and document the prop tip behavior with the stock rubber coupler/damper, so I can see if it gets any better with the new softer one. As you can see, it gets pretty wild at times, particularly when changing rpms. I'm not sure this is completely abnormal though, because I've watched the Subaru engines on the RAF2000 gyro do the exact same thing. They even have a bit of tip wandering too, so some of this may be OK. During the video, you'll hear me say 2600 rpm, and at that point, the tips are wandering fore and aft a bit. The next rpm tested was 3500, and it appears fairly smooth. You'll note that my throttle control doesn't have much friction, and closes itself if I don't hold it. By the time I say 3500 rpm into the camera, you can see that the engine has slowed down considerably, so 3500 is the point where I get up to come back to the camera, not when I say 3500. For that reason, 4000 rpm became a hand signal, and appears perfectly smooth. The video is 60 MB, so not for the dialup crowd unless you download it overnight. Also, if there's more traffic than I expect, I may have to shut the link down to preserve my web space quota for the month. http://www.radrotary.com/WL_original_damper.wmv Rusty -al wick Cozy IV powered by Turbo Subaru 3.0R with variable valve lift and cam timing. Artificial intelligence in cockpit, N9032U 240+ hours from Portland, Oregon Glass panel design, Subaru install, Prop construct, Risk assessment info: http://www.maddyhome.com/canardpages/pages/alwick/index.html ----__JNP_000_45b6.7d08.43f6 Content-Type: text/html; charset=us-ascii Content-Transfer-Encoding: quoted-printable Message
What a great video. I ran it in slow motion. At one point I had = impression=20 that blade had flexed far enough to hit trailer! I would be very concerned = for=20 blade flex unless I had clear proof it has no long term effect.
 
Check out the movement of  wires and hoses. Makes you appreciate = the=20 import of adding supports and wire ties.
 
I was curious if video from in front would show the same effects.= If=20 it doesn't, possibly cause is related to fore/aft blade support. Not=20 likely, but worth checking.
 
Excellent analysis tool, video. Good work.
 

-al wick
Cozy IV powered by Turbo Subaru 3.0R with variable = valve=20 lift and cam timing.
Artificial intelligence in cockpit, N9032U 240+ = hours=20 from Portland, Oregon
Glass panel design, Subaru install, Prop construct= ,=20 Risk assessment info:
http:= //www.maddyhome.com/canardpages/pages/alwick/index.html
 
On Mon, 4 Jun 2007 10:16:16 -0500 "Russell Duffy" <rusty@radrotary.com> writes:
Greetings,
 
I made a short = video=20 yesterday of a single rotor run.  The purpose was to demonstrate and= =20 document the prop tip behavior with the stock rubber coupler/damper, so I= can=20 see if it gets any better with the new softer one.  =20
 
As you can see, = it gets=20 pretty wild at times, particularly when changing rpms.  I'm not sure= this=20 is completely abnormal though, because I've watched the Subaru engines on= the=20 RAF2000 gyro do the exact same thing.  They even have a bit of tip=20 wandering too, so some of this may be OK.
 
During the video= , you'll=20 hear me say 2600 rpm, and at that point, the tips are wandering fore and = aft a=20 bit.  The next rpm tested was 3500, and it appears fairly smooth.&= nbsp;=20 You'll note that my throttle control doesn't have much friction, and= =20 closes itself if I don't hold it.  By the time I say 3500 rpm into = the=20 camera, you can see that the engine has slowed down considerably, so 3500= is=20 the point where I get up to come back to the camera, not when I say=20 3500.  For that reason, 4000 rpm became a hand signal, and = appears=20 perfectly smooth.     
 
The video is 60 = MB, so=20 not for the dialup crowd unless you download it overnight.  Also, if= =20 there's more traffic than I expect, I may have to shut the link down to=20 preserve my web space quota for the month. 
 
http://www.= radrotary.com/WL_original_damper.wmv
 
Rusty=20
 
 
 
 
 

-al wick
Cozy IV powered by Turbo = Subaru=20 3.0R with variable valve lift and cam timing.
Artificial intelligence = in=20 cockpit, N9032U 240+ hours from Portland, Oregon
Glass panel design, = Subaru=20 install, Prop construct, Risk assessment=20 info:
http://www.maddyhome.com/canardpages/pages/alwick/index.html
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